PLATE V. 



Figure 23.— Chifidotea Tnftsii Harger (p. 340); a, anfcennula; h, antenna; c, leg of 

 tlie first pair ; d, leg of the foi:rtli paii- ; all enlarged twelve diameters ; 

 €, left vu'opod, or opercular valve, inner view, enlarged ten diameters. 



24. — Idotea irrorata Edwards (p. 343) ; dorsal view, enlarged two diameters ; 

 natural size sliown by the line on the left. 



25. — The same ; a, antennula ; i, antenna ; c, left uropod or opercular valve, 

 external view ; all enlarged six diameters. 



26. — The same; a, right maxilliped, enlarged twelve dialneters, I, external 

 lamella ; m, basal segment ; 1, 2, 3, 4, segments of i^alpus of maxilliped ; 

 h, pleopod of the second pau' from a male, enlarged eight diameters, show- 

 ing stylet, s, articulated near the base of the inner lamella. 



27. — Idotea phosphorea Harger (p. 347); dorsal view, enlarged about two 

 diameters ; natural size shown by the line on the right. 



28. — The same; a, antenna, enlarged six diameters; J>, maxilUped, enlarged 

 twelve diameters, showing, I, external lamella ; m, basal segments ; 1, 2, 

 3, 4, segments of the pal^^us of maxilliped ; c, leg of the first pair ; d, leg 

 of the second pair, both enlarged six diameters ; e, right uropod, or 

 opercular valve, inner view, enlarged six diameters. 



29. — The same ; pleopod of the second pair from a male, enlarged eight diam- 

 eters ; s, stylet articulated near the base of the inner lamella ; s', distal 

 end of stylet reversed and enlarged thirty diameters. 

 (Figure 24 was drawn by ]VIr. J. H. Emerton, the others by O. Harger.) 



